Java学生成绩排名实现教程

class Student {
    private String name;
    private double score;

    public Student(String name, double score) {
        this.name = name;
        this.score = score;
    }

    public String getName() {
        return name;
    }

    public double getScore() {
        return score;
    }

    @Override
    public String toString() {
        return "姓名：" + name + "，成绩：" + score;
    }
}

import java.util.*;

public class ScoreRanking {
    public static void main(String[] args) {
        List<Student> students = new ArrayList<>();
        students.add(new Student("张三", 85.5));
        students.add(new Student("李四", 92.0));
        students.add(new Student("王五", 78.0));
        students.add(new Student("赵六", 96.5));
        students.add(new Student("钱七", 88.0));

        // 按成绩降序排列
        students.sort((a, b) -> Double.compare(b.getScore(), a.getScore()));

        // 输出排名
        System.out.println("学生成绩排名：");
        for (int i = 0; i < students.size(); i++) {
            System.out.println("第" + (i + 1) + "名：" + students.get(i));
        }
    }
}

students.sort((a, b) -> {
    int scoreCompare = Double.compare(b.getScore(), a.getScore());
    if (scoreCompare != 0) {
        return scoreCompare;
    }
    return a.getName().compareTo(b.getName()); // 成绩相同时按姓名排序
});

System.out.printf("第%d名：%s，成绩：%.2f%n", i + 1, students.get(i).getName(), students.get(i).getScore());